From 4df8100b10306f51504bf6985ad9ba97ca42688d Mon Sep 17 00:00:00 2001
From: Robert Anderson <robert@noisysocks.com>
Date: Thu, 30 Mar 2023 16:21:34 +1100
Subject: [PATCH] Add a copy filter that lets plugins customise how they are
 duplicated

---
 packages/blocks/src/api/factory.js | 27 +++++++++------------------
 1 file changed, 9 insertions(+), 18 deletions(-)

diff --git a/packages/blocks/src/api/factory.js b/packages/blocks/src/api/factory.js
index 6df8eb00005a8e..ad96b7f0136be7 100644
--- a/packages/blocks/src/api/factory.js
+++ b/packages/blocks/src/api/factory.js
@@ -83,37 +83,28 @@ export function createBlocksFromInnerBlocksTemplate(
  * Given a block object, returns a copy of the block object while sanitizing its attributes,
  * optionally merging new attributes and/or replacing its inner blocks.
  *
- * @param {Object} block           Block instance.
- * @param {Object} mergeAttributes Block attributes.
- * @param {?Array} newInnerBlocks  Nested blocks.
+ * @param {Object} block Block instance.
  *
  * @return {Object} A cloned block.
  */
-export function __experimentalCloneSanitizedBlock(
-	block,
-	mergeAttributes = {},
-	newInnerBlocks
-) {
+export function __experimentalCloneSanitizedBlock( block ) {
 	const clientId = uuid();
 
 	const sanitizedAttributes = __experimentalSanitizeBlockAttributes(
 		block.name,
-		{
-			...block.attributes,
-			...mergeAttributes,
-		}
+		block.attributes
 	);
 
-	return {
+	const newBlock = {
 		...block,
 		clientId,
 		attributes: sanitizedAttributes,
-		innerBlocks:
-			newInnerBlocks ||
-			block.innerBlocks.map( ( innerBlock ) =>
-				__experimentalCloneSanitizedBlock( innerBlock )
-			),
+		innerBlocks: block.innerBlocks.map( ( innerBlock ) =>
+			__experimentalCloneSanitizedBlock( innerBlock )
+		),
 	};
+
+	return applyFilters( 'blocks.copyBlock', newBlock );
 }
 
 /**